My friend Pamela Colloff wrote a haunting and powerful two part story about a Texas man named Michael Morton who was accused of brutally murdering his wife, convicted, and then after 20 years, was exonerated by the Innocence Project. The Texas DA who convicted him, Ken Anderson, deliberately withheld evidence - and it turned out had done so in many other cases over the years (including the case of Cameron Todd Willingham who was executed by Texas in the 2000’s for an arson that killed his family - which he never committed). David Grann wrote about Willingham in one of the best pieces of narrative non fiction I've ever read, Trial By Fire.